The unsigned missive contained printouts of news stories about Salesforce.com outages; a quote from Salesforce.com CEO Marc Benioff about the demise of the American car industry; and a report on the background of Patrick Pelata, a recently hired Salesforce executive.

Monty claimed the letter he posted was the second one he'd received.

Oracle PR reps told ZDNet the company was investigating the incident. An Oracle spokesperson contacted by Business Insider declined to comment.

We asked Salesforce.com for more information and we'll update if we hear back.

Here's the envelope the letter was mailed in and one of the pages, via Monty's Facebook page: